{"id":167,"date":"2011-05-16T23:14:44","date_gmt":"2011-05-16T15:14:44","guid":{"rendered":"http:\/\/guoh.ai\/lifelog\/?p=167"},"modified":"2011-05-18T21:20:03","modified_gmt":"2011-05-18T13:20:03","slug":"memos-about-true_form-ones_complement-twos_complement","status":"publish","type":"post","link":"https:\/\/guoh.ai\/lifelog\/2011\/05\/memos-about-true_form-ones_complement-twos_complement\/","title":{"rendered":"\u539f\u7801\uff0c\u53cd\u7801\uff0c\u8865\u7801\u5907\u5fd8"},"content":{"rendered":"

\u53c8\u662f\u4e00\u7bc7\u7092\u73b0\u996d\u7684\u5e16\u5b50\uff0c\u4e3b\u8981\u662f\u7ecf\u5e38\u5fd8\u8bb0\uff0c\u8bb0\u5728\u8fd9\u91cc<\/strong><\/p>\n

\u9996\u5148\u7406\u89e3\u4f4dbit(Binary digit http:\/\/en.wikipedia.org\/wiki\/Bit)<\/p>\n

\u4ee5\u4e0b\u90fd\u4ee5\u4e8c\u8fdb\u5236\u4e3a\u4f8b<\/p>\n

\u6bd4\u5982\u4e00\u4e2a8\u4f4d\u7684\u5b58\u50a8\u5355\u5143\uff0c\u90a3\u4e48\u5b83\u5c31\u53ef\u4ee5\u4fdd\u5b58256\u79cd\u4e0d\u540c\u72b6\u6001\uff0c\u5982\u679c\u662f\u65e0\u7b26\u53f7\u6570\u7684\u8bdd\uff0c\u90a3\u4e48\u5c31\u662f0 ~ 2^8-1\uff0c\u537300000000 ~ 11111111<\/p>\n

\u90a3\u4e48\u5bf9\u4e8e\u6709\u7b26\u53f7\u7684\u6570\u5c31\u662f-2^7 ~ 2^7-1\uff0c\u6700\u9ad8\u4f4d\u62ff\u6765\u5b58\u50a8\u7b26\u53f7\u4e86\uff0c0\u4e3a\u6b63\uff0c1\u4e3a\u8d1f\uff0c\u537310000001 ~ 01111111<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u5341\u8fdb\u5236<\/td>\n\u539f\u7801<\/td>\n\u53cd\u7801<\/td>\n\u8865\u7801<\/td>\n<\/tr>\n
127<\/td>\n01111111<\/td>\n01111111<\/td>\n01111111<\/td>\n<\/tr>\n
-127<\/td>\n11111111<\/td>\n10000000<\/td>\n10000001<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
128<\/td>\n0<\/span>10000000<\/td>\n0<\/span>10000000<\/td>\n0<\/span>10000000<\/td>\n<\/tr>\n
-128<\/td>\n<\/td>\n<\/td>\n10000000<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
45<\/td>\n00101101<\/td>\n00101101<\/td>\n00101101<\/td>\n<\/tr>\n
-45<\/td>\n10101101<\/td>\n11010010<\/td>\n11010011<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
1<\/td>\n00000001<\/td>\n00000001<\/td>\n00000001<\/td>\n<\/tr>\n
-1<\/td>\n10000001<\/td>\n11111110<\/td>\n11111111<\/td>\n<\/tr>\n<\/table>\n

\u4e0a\u8868\u4e2d\u7ea2\u8272\u7684\u6570\u662f\u8868\u793a\u6ea2\u51fa\u7684\uff0c8\u4f4d\u7684\u5b58\u50a8\u7a7a\u95f4\u65e0\u6cd5\u8868\u793a\u8fd9\u6837\u7684\u6709\u7b26\u53f7\u6570<\/p>\n

\u8ba1\u7b97\u673a\u4e2d\u7684\u6709\u7b26\u53f7\u6570\u90fd\u662f\u4ee5\u8865\u7801\u7684\u5f62\u5f0f\u5b58\u653e\u7684\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u53ea\u6709\u6709\u7b26\u53f7\u6570\u624d\u6709\u539f\u7801\uff0c\u53cd\u7801\uff0c\u8865\u7801
\n\u6b63\u6570\u7684\u539f\u7801\uff0c\u53cd\u7801\uff0c\u8865\u7801\u8868\u793a\u90fd\u4e00\u6837
\n\u8d1f\u6570\u7684\u539f\u7801\u4e3a\u5176\u7edd\u5bf9\u503c\u7684\u539f\u7801\uff0c\u4f46\u7b26\u53f7\u4f4d\u4e3a1\uff1b\u53cd\u7801\u5c31\u662f\u4fdd\u6301\u539f\u7801\u7684\u7b26\u53f7\u4f4d\u4e0d\u53d8\uff0c\u5176\u4ed6\u4f4d\u6309\u4f4d\u53d6\u53cd\uff1b\u8865\u7801\u5c31\u662f\u53cd\u7801\u52a01<\/p>\n

\u5f15\u7528Wikipedia
\n\u201c\u4e00\u4e2a\u6570\u5b57\u7684\u4e8c\u8865\u6570\u5c31\u662f\u5c06\u8be5\u6570\u5b57\u4f5c\u4f4d\u53cd\u76f8\u8fd0\u7b97\uff08\u5373\u4e00\u8865\u6570\uff09\uff0c\u518d\u5c06\u7ed3\u679c\u52a0 1\uff0c\u5373\u4e3a\u8be5\u6570\u5b57\u7684\u4e8c\u8865\u6570\u3002\u201d<\/p>\n

\u4e3a\u4ec0\u4e48\u8981\u5f15\u5165\u539f\u7801\uff0c\u53cd\u7801\uff0c\u8865\u7801\u8fd9\u4e9b\u6982\u5ff5
\n\u53c2\u89c1\uff1ahttp:\/\/dev.csdn.net\/htmls\/17\/17680.html<\/p>\n

\u6211\u4eec\u6700\u9700\u8981\u5173\u6ce8\u7684\u662f\u8865\u7801\uff0c\u5f15\u7528\u4f5c\u8005\u7684\u539f\u8bdd\u662f
\n\u201c
\n\u8865\u7801\u7684\u8bbe\u8ba1\u76ee\u7684\u662f:
\n\u2474\u4f7f\u7b26\u53f7\u4f4d\u80fd\u4e0e\u6709\u6548\u503c\u90e8\u5206\u4e00\u8d77\u53c2\u52a0\u8fd0\u7b97\uff0c\u4ece\u800c\u7b80\u5316\u8fd0\u7b97\u89c4\u5219
\n\u2475\u4f7f\u51cf\u6cd5\u8fd0\u7b97\u8f6c\u6362\u4e3a\u52a0\u6cd5\u8fd0\u7b97\uff0c\u8fdb\u4e00\u6b65\u7b80\u5316\u8ba1\u7b97\u673a\u4e2d\u8fd0\u7b97\u5668\u7684\u7ebf\u8def\u8bbe\u8ba1
\n\u201d<\/p>\n

\u5f15\u7528\u81eahttp:\/\/zh.wikipedia.org\/wiki\/\u4e8c\u88dc\u6578
\n\u201c\u5728\u4e8c\u8865\u6570\u7cfb\u7edf\u4e2d\uff0c\u4e00\u4e2a\u8d1f\u6570\u5c31\u662f\u7528\u5176\u5bf9\u5e94\u6b63\u6570\u7684\u4e8c\u8865\u6570\u6765\u8868\u793a\u3002<\/a>\u201d
\n 00000100 4
\n 11111011 \u6309\u4f4d\u53d6\u53cd
\n 11111100 \u4e8c\u8865\u6570(-4)<\/p>\n

\u201c\u51cf\u6cd5\u53ef\u4ee5\u7528\u4e00\u4e2a\u6570\u52a0\u4e0a\u53e6\u4e00\u4e2a\u6570\u7684\u4e8c\u8865\u6570\u6765\u8868\u793a<\/a>\u201d
\n 5
\n -4
\n———-
\n 1<\/p>\n

00000101
\n +11111100
\n———-
\n 000000001<\/p>\n

\u53e6\u5916\u5b57\u8282(Byte)\uff0c\u5b57(Word)\uff0c\u53cc\u5b57\uff0c\u56db\u5b57\uff0c\u5b57\u957f\u8fd9\u4e9b\u6982\u5ff5\u90fd\u9700\u8981\u7406\u89e3<\/p>\n

\u962e\u4e00\u5cf0\u6709\u4e2a\u5e16\u5b50<\/a>\u8bb2\u7684\u4e5f\u5f88\u6e05\u695a\u660e\u4e86<\/p>\n

\u53c2\u8003<\/p>\n

http:\/\/zh.wikipedia.org\/wiki\/\u539f\u7801
\nhttp:\/\/zh.wikipedia.org\/wiki\/\u53cd\u7801
\nhttp:\/\/zh.wikipedia.org\/wiki\/\u4e8c\u88dc\u6578
\nhttp:\/\/en.wikipedia.org\/wiki\/One’s_complement
\nhttp:\/\/en.wikipedia.org\/wiki\/Two’s_complement<\/p>\n","protected":false},"excerpt":{"rendered":"

\u53c8\u662f\u4e00\u7bc7\u7092\u73b0\u996d\u7684\u5e16\u5b50\uff0c\u4e3b\u8981\u662f\u7ecf\u5e38\u5fd8\u8bb0\uff0c\u8bb0\u5728\u8fd9\u91cc \u9996\u5148\u7406\u89e3\u4f4dbit(Binary digit http:\/\/en.wikipedia.org\/wiki\/Bit) \u4ee5\u4e0b\u90fd\u4ee5\u4e8c\u8fdb\u5236\u4e3a\u4f8b \u6bd4\u5982\u4e00\u4e2a8\u4f4d\u7684\u5b58\u50a8\u5355\u5143\uff0c\u90a3\u4e48\u5b83\u5c31\u53ef\u4ee5\u4fdd\u5b58256\u79cd\u4e0d\u540c\u72b6\u6001\uff0c\u5982\u679c\u662f\u65e0\u7b26\u53f7\u6570\u7684\u8bdd\uff0c\u90a3\u4e48\u5c31\u662f0 ~ 2^8-1\uff0c\u537300000000 ~ 11111111 \u90a3\u4e48\u5bf9\u4e8e\u6709\u7b26\u53f7\u7684\u6570\u5c31\u662f-2^7 ~ 2^7-1\uff0c\u6700\u9ad8\u4f4d\u62ff\u6765\u5b58\u50a8\u7b26\u53f7\u4e86\uff0c0\u4e3a\u6b63\uff0c1\u4e3a\u8d1f\uff0c\u537310000001 ~ 01111111 \u5341\u8fdb\u5236 \u539f\u7801 \u53cd\u7801 \u8865\u7801 127 01111111 01111111 01111111 -127 11111111 10000000 10000001 128 010000000 010000000 010000000 -128 10000000 45 00101101 00101101 00101101 -45 10101101 11010010 11010011 1 00000001 00000001 00000001 -1 10000001 11111110 11111111 \u4e0a\u8868\u4e2d\u7ea2\u8272\u7684\u6570\u662f\u8868\u793a\u6ea2\u51fa\u7684\uff0c8\u4f4d\u7684\u5b58\u50a8\u7a7a\u95f4\u65e0\u6cd5\u8868\u793a\u8fd9\u6837\u7684\u6709\u7b26\u53f7\u6570 \u8ba1\u7b97\u673a\u4e2d\u7684\u6709\u7b26\u53f7\u6570\u90fd\u662f\u4ee5\u8865\u7801\u7684\u5f62\u5f0f\u5b58\u653e\u7684\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u53ea\u6709\u6709\u7b26\u53f7\u6570\u624d\u6709\u539f\u7801\uff0c\u53cd\u7801\uff0c\u8865\u7801 \u6b63\u6570\u7684\u539f\u7801\uff0c\u53cd\u7801\uff0c\u8865\u7801\u8868\u793a\u90fd\u4e00\u6837 \u8d1f\u6570\u7684\u539f\u7801\u4e3a\u5176\u7edd\u5bf9\u503c\u7684\u539f\u7801\uff0c\u4f46\u7b26\u53f7\u4f4d\u4e3a1\uff1b\u53cd\u7801\u5c31\u662f\u4fdd\u6301\u539f\u7801\u7684\u7b26\u53f7\u4f4d\u4e0d\u53d8\uff0c\u5176\u4ed6\u4f4d\u6309\u4f4d\u53d6\u53cd\uff1b\u8865\u7801\u5c31\u662f\u53cd\u7801\u52a01 \u5f15\u7528Wikipedia \u201c\u4e00\u4e2a\u6570\u5b57\u7684\u4e8c\u8865\u6570\u5c31\u662f\u5c06\u8be5\u6570\u5b57\u4f5c\u4f4d\u53cd\u76f8\u8fd0\u7b97\uff08\u5373\u4e00\u8865\u6570\uff09\uff0c\u518d\u5c06\u7ed3\u679c\u52a0 … Continue reading \u539f\u7801\uff0c\u53cd\u7801\uff0c\u8865\u7801\u5907\u5fd8<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gfmr_meta_descriptions":[],"_gfmr_multilingual_taxonomy_terms":[],"footnotes":""},"categories":[5,8],"tags":[],"class_list":["post-167","post","type-post","status-publish","format-standard","hentry","category-cs","category-paste"],"_links":{"self":[{"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/posts\/167","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/comments?post=167"}],"version-history":[{"count":31,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/posts\/167\/revisions"}],"predecessor-version":[{"id":170,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/posts\/167\/revisions\/170"}],"wp:attachment":[{"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/media?parent=167"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/categories?post=167"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/tags?post=167"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}